chrome/browser/ui/views/tabs/tab_strip_observer.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_OBSERVER_H_
   6 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_OBSERVER_H_
   7
   8 #include "chrome/browser/ui/views/chrome_views_export.h"
   9
  10 class TabStrip;
  11
  12 ////////////////////////////////////////////////////////////////////////////////
  13 //
  14 // TabStripObserver
  15 //
  16 //  Objects implement this interface when they wish to be notified of changes
  17 //  to the TabStrip.
  18 //
  19 //  Register your TabStripObserver with the TabStrip using its
  20 //  Add/RemoveObserver methods.
  21 //
  22 ////////////////////////////////////////////////////////////////////////////////
  23 class CHROME_VIEWS_EXPORT TabStripObserver {
  24  public:
  25   // A new tab was added to |tab_strip| at |index|.
  26   virtual void TabStripAddedTabAt(TabStrip* tab_strip, int index);
  27
  28   // The tab at |from_index| was moved to |to_index| in |tab_strip|.
  29   virtual void TabStripMovedTab(TabStrip* tab_strip,
  30                                 int from_index,
  31                                 int to_index);
  32
  33   // The tab at |index| was removed from |tab_strip|.
  34   virtual void TabStripRemovedTabAt(TabStrip* tab_strip, int index);
  35
  36   // Sent when the |tabstrip| is about to be deleted and any reference held must
  37   // be dropped.
  38   virtual void TabStripDeleted(TabStrip* tab_strip);
  39
  40  protected:
  41   virtual ~TabStripObserver() {}
  42 };
  43
  44 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_STRIP_OBSERVER_H_